Two-cycle engine and compressor



April 5, 1949. H. Tl-:TREAULT TWO-CYCLE ENGINE AND COMPRESSOR Filed May 27, 194s Patented Apr. 5, 1949 UNITED ySTATES lPATENT GFFECE TWO-CYCLE ENGINE AND COMPRESSOR Hector Ttreault, Montreal, Quebec, Canada Application May 27, 1946, Serial No. 672,381

(Cl. 23u- 56) 1 Claim. l

The present invention pertains to a novel twocycle engine and compressor, and the principal object is to provide a device of this character in which the cylinders, horizontally alined, are not rigidly anchored, in order to eliminate undue strains on the structure.

In the accomplishment of this object the alined cylinders are carried by supports which in turn are slidably mounted on a base. Although the mechanism is for the most part in dynamic balance, any unbalance that occurs is permitted to become converted into a sliding movement of the supports, in the absence of a rigid anchorage. At the ends of the base are provided shock absorbers which are engaged by the supports in the event the supports reach an extreme position.

Between the alined engine cylinders is mounted a compressor cylinder sealed therefrom. A common piston rod carries a piston in each of the three cylinders, the intermediate piston operating as a compressor inasmuch as its cylinder is provided with fluid inlet and outlet means at.

opposite sides of the piston.

The engine cylinders are equipped for twocycle operation in which certain ports are controlled by the piston in the usual manner. The invention is applicable to both steam and internal combustion engines, although the latter is illustrated herein. The internal combustion engine is equipped With electrical ignition means, and in this connection a further object of the invention is to operate the ignition circuit in timed relation by means of the engine pistons. p

For this purpose the ignition means for each cylinder is in a circuit with a fixed and a movable contact mounted on the cylinder wall. The movable Contact is connected through the cylinder wall to a lever positioned within the cylinder and spaced slightly from the inner cylinder wall. The skirt of the piston is tapered to enter between the lever and the cylinder wall and thus operate the movable contact and close the ignition circuit at the proper time.

The invention is fully disclosed by way of example in the following description and in the accompanying drawings in which:

Figure 1 is a longitudinal section of the device, partly in elevation; and

Figure :2 is a section on the line 2--2 of Figure 1.

Reference to these views will now be made by `use of like characters which are employed to vdesignate corresponding parts throughout.

In Figure 1 is shown a horizontal base I on which are mounted uprights or shoes 2 which carry the cylinders of the engine, as will presently be shown. The sliding uprights 2 carry opposed cylinders 3 and 4 fastened by bolts 5. The intermediate uprights 2 are extended to form the spaced end Walls or bottoms 6 of the cylinders 3, 4 which are spaced apart. Between these is fastened an alined and intermediate cylinder I by means of bolts 8 for a purpose that will presently be described.

The head of each cylinder is jacketed at 9 and provided with a spark plug I0 in the end. Each cylinder is also formed with a by-pass II positioned to lead from one side of the enclosed piston to the other at certain intervals for the usual two-cycle operation. Also, each piston is formed with injection ports I2 and I3 respectively at the head and 'by-pass for priming. Exhaust pipes I4 lead from the opposite or inner ends adjacent to the walls G.

A piston rod I5 is mounted axially in the alined cylinders and is supported in bearings I6 on the end walls 6. Pistons I'I are carried by the ends of the piston rod and work in the respective cylinders 3 and 4. Another exhaust port I8 is formed in each cylinder head and is adapted to be covered at times by the corresponding piston II as in the usual two-cycle operation. l

Each cylinder carries externally a'xed contact I9 and a movable contact 20 controlling the corresponding ignition circuit. Each Contact 20 is carried on a stem 2I passing slidably through the cylinder wall and there attached to a spring lever 22. The flared skirt 23 of the cylinder is adapted to Wedge between the lever 22 and the inner cylinder wall, thereby closing the ignition circuit at the proper time. v

In the intermediate cylinder 1, the piston rod I5 carries a compressor piston 24. The cylinder I has intake and-exhaust ports 25 and 26 respectively for air or other fluid. It is thus apparent that the piston 24 within the cylinder I operates as a compressor.

It has been stated that the uprights 2 are freely slidable on the base I. The pistons and cylinders remain for the most part in dynamic balance without restraint on the uprights 2. However, some shifting might occur, and this is permitted to take place rather than provide rigid anchoring means for the cylinders.

At each end of the base I is provided a shock absorber including a bumper l2I having a stem 28 projecting slidably through a iinger 29 on the base. The stem is surrounded by a shock absorbing spring 30 bearing lon the head and the finger.

Thus, if either upright approaches an end ofthe base I, it is automatically cushioned'.

Although a'specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in `the details of construction may be made without departing from the scope of the invention asindicated by the appended claim.

What l', claim as my invention is: l

A two-cycle engine and compressor comprising a pair of engine cylinders mounted in horizontal alinement and spaced apart, a compressor cylinder mounted between the engine cylinders. a piston rod slidable axially in the several cylinders, pistons carried by said rod and working in the respective cylinders, intake and exhaust means for the several cylinders, ignition means in the engine cylinders, and ixed and movable contacts on said engine cylinders for HECTOR. TrREAULT.

REFERENCES CITED The following references are of record in the iile of this patent: l

UNITED STATES PATENTS Number Name Date 804,884 Rutan Nov. 21, 1905 1,389,424 De Brun Aug. 30, 1921 2,182,816 Moffett Dec. 12, 1939 2,382,598

Andresen Aug. 14, 1945 

